High fidelity laser beam shaping using liquid crystal on silicon spatial light modulators as diffractive neural networks
Abstract
Spatial light modulators (SLMs) based on liquid crystal on silicon (LCoS) are powerful tools for laser beam shaping as they can be used to dynamically create almost arbitrary intensity distributions. However, laser beam shaping with LCoS-SLMs often suffers from beam shaping artifacts in part caused by unconsidered properties of the LCoS devices: Astigmatism that stems from the non-normal incidence of the laser beam on the SLM and the effect commonly referred to as the '0-th diffraction order' that is caused by both the crosstalk between neighboring pixels and the direct reflection at the cover glass of the SLM. We here present a method to consider and compensate for these inherent properties of LCoS devices by treating the SLM as a diffractive neural network.
Authors 4
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Affiliation as printed
Chair for Technology of Optical Systems, RWTH Aachen University, 52074 Aachen, Germany
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Affiliation as printed
Chair for Technology of Optical Systems, RWTH Aachen University, 52074 Aachen, Germany
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Jochen Stollenwerk Aachen Chair for Technology of Optical Systems Fraunhofer Institute for Laser Technology (ILT)
RWTH Aachen University · Fraunhofer Institute for Laser Technology
Affiliation as printed
Chair for Technology of Optical Systems, RWTH Aachen University, 52074 Aachen, Germany
Fraunhofer-Institute for Laser Technology, 52074 Aachen, Germany
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Carlo Holly Aachen Chair for Technology of Optical Systems Fraunhofer Institute for Laser Technology (ILT)
RWTH Aachen University · Fraunhofer Institute for Laser Technology
Affiliation as printed
Chair for Technology of Optical Systems, RWTH Aachen University, 52074 Aachen, Germany
Fraunhofer-Institute for Laser Technology, 52074 Aachen, Germany
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